tophatyachts.com

Gday,
Im considering putting an outboard either in the well or hanging off the blunt end....

What size hp do you think is optimum?
Weight is the critical factor (so that really rules out 4st??), as i'll be lifting it around at times.
Keith seems happy with the 5hp(i think it is), I would consider the 6hp if the same weight, or is the consensus that an 8hp would be better?

cheers

Dont mind me...should of done a search.... good answers to same questions here viewtopic.php?f=3&t=815

cheers

Is your diesel beyond repair Shaun?

With a proper rope and pulley system you can lift a 4stroke around.

Size to fit in the well may be an issue.

My 8HP works well.

But I think I have said that before.

I have a 9.9hp yamah short sharft that we had at home on our runabout which im using at the moment which weighs 46 kilograms, but soon ill be buying a 9.9 yamah or 15 longsharft the 9.9 are the same weight bore and stroke as the 15s. I am building at the moment a rack which I saw on a mark 3 tophat near Gladsville bridge which sits on the cockpit combing and you lift it straight up and put it on the rack, which saves carrying it around and damaging things.
Ive been researching alot and I think I am going to get a chinese outboard because there cheap and i think i there a knock off of the mariners. Let me know what you guys think of it.
http://www.ozwayonline.com.au/OutboardMotors.html

Aaron.

But really I think it is all in the propellor, you can buy props that are designed for pushing yachts.

This is one of many prop calculators available.

http://vicprop.com/displacement_size.php

Worth doing.

Cheers,

Tom

As said above, prop is important (Shaun, I am sure you are aware of that). Often the less powerful motor is same weight as more powerful ones or only slightly lighter. It might be worth considering whether it is single or 2 cylinder. I often think a extra long shaft motor would be nice (are these available in 8 hp range), because when one sees where long shaft puts prop relative to prop on inboard it is food for thought.

Thank you for the thoughts everyone, Aaron im keen to see some pics of the rack you are making.
Yes John, I also think an extra long shaft would be better.

storm petrel wrote:Is your diesel beyond repair Shaun?

Not really Mark.
Im pre-empting the inevitable, at the moment its engine mounts, but what next??
The engine itself, starts first time, everytime, even after it hadnt been started for quite some time before I bought her. It has great things like a solid bronze impeller etc, but its the appendages like the mounts, gear linkages, stern gland, all the electricals, seacocks for it etc etc etc.
So at the moment I dont know.



cheers

Wow it looks like something from the industrial revolution. You could probably pick up a reasonable second hand diesel for a couple of thousand. Minards are expensive but often have rebuilt yammers for sale. Afloat also have secondhand diesels advertised regularly. Seems a shame to go to an outboard if you have the inboard peripherals but I can understand you wanting to go to something less problematic.